In court documents, prosecutors alleged that Jeffrey J. Cooper, 19, “knowingly exposed his sex organ with the intent to arouse his sexual desires” on Nov. 10 in the Cook County Jail, where he’s been held since January on charges of first-degree murder, armed robbery and aggravated vehicular hijacking.

Cooper and another man, Marquis L. Byrd, were charged with robbing and killing Maricela Vera on Jan. 15 in northwest suburban Melrose Park. Vera, 41, was standing outside her car in her garage early this year when a gunman stole her purse and shot her, police said at the time. A judge ordered the pair held without bond in January.

Court records show that Cooper and Byrd last appeared before a judge on those charges on Dec. 5, when their case was continued.

The arrest report for Cooper’s public indecency charge provided few details, beyond that the alleged crime took place in the jail’s Custody Division 9, 2834 W. 31st St., and that Cooper was arrested by the Cook County Sheriff’s Police.

Appearing in bond court Saturday wearing handcuffs, shackles and a tan jumpsuit, Cooper was ordered held on $25,000 bail on the public indecency charge by Cook County Circuit Judge Laura Marie Sullivan. Even if he posted that bond, Cooper would remain jailed on the other charges.

Federal authorities last week returned to the home of a Chicago-area teen accused of trying to travel to join the Islamic State and seized several cellphones and computer equipment apparently belonging to his siblings who are minors and have not been charged, the teen’s lawyer said...